optim

print("Combustible a consumir: ")
fuel=read()

turtle.up()
while true do
    while turtle.detect() do
        turtle.dig()
    end
    turtle.forward()
    turtle.digUp()
    turtle.digDown()
    turtle.turnRight()
    for i=1,2,1 do
        while turtle.detect() do
            turtle.dig()
        end
        turtle.forward()
        turtle.digUp()
        turtle.digDown()
    end
    turtle.turnLeft()
    while turtle.detect() do
        turtle.dig()
    end
    turtle.forward()
    turtle.turnLeft()
    turtle.digUp()
    turtle.digDown()
    for i=1,2,1 do
        while turtle.detect() do
            turtle.dig()
        end
        turtle.forward()
        turtle.digUp()
        turtle.digDown()
    end
    turtle.turnRight()
end